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Round|Natural|GIA

1.00ct F SI1 Round Natural Diamond

EX • F/SI1 • GIA 1565410290

Certificate GIA 1565410290

Diamond specifications and retailer prices

From £1,798 GBP
As of November 6, 2026
Save £2,347 GBP (57%) vs most expensive(unlock to see where)
24 retailers carry this diamond
Most expensive: £4,144 GBP at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1ct natural round diamond

This 1ct natural round sits in the classic one-carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1565410290. Listed at 24 retailers as of November 5, 2026, with prices from £1,798 to £4,144, a £2,347 spread on the same certified stone. NZ Jewellers lists it at £4,144. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.00
Carat
F
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 1565410290
Dimensions6.39 × 6.41 × 3.92 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Twinning Wisp, Feather
Top View
6.39 mm6.41 mm1.00 ctF / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1565410290
Side View
Table 60.0%Crown 35°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 61.3%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £4,144 GBP|Low: £1,778 GBP|High: £4,144 GBP|Avg: £2,702 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Retailer 18
November 6, 2026
Retailer 3£1,798 GBP
Retailer 2£1,863 GBP
Retailer 15£2,090 GBP
Retailer 17£2,174 GBP
Retailer 10£2,196 GBP
Retailer 4£2,200 GBP
Retailer 11£2,276 GBP
Retailer 5£2,379 GBP
Retailer 7£2,379 GBP
Retailer 13£2,446 GBP
Retailer 6£2,471 GBP
Retailer 12£2,493 GBP
Retailer 9£2,745 GBP
Retailer 16£2,767 GBP
Retailer 14£2,903 GBP
Retailer 8£3,961 GBP
Retailer 18£3,978 GBP
NZ Jewellers£4,144 GBP

21 data points across 18 retailers

24 retailers£1,798 GBP to £4,144 GBP

A
Cheapest Retailer
-
£1,798 GBP
A
Retailer 2
-
£1,863 GBP
View
A
Retailer 3
-
£2,090 GBP
View
B+
Retailer 4
-
£2,132 GBP
View
B+
Retailer 5
-
£2,170 GBP
View
B+
Retailer 6
-
£2,174 GBP
View
B+
Retailer 7
-
£2,196 GBP
View
Final sale: no returns
B+
Retailer 8
-
£2,200 GBP
View
B+
Retailer 9
-
£2,200 GBP
View
B+
Retailer 10
-
£2,276 GBP
View
B+
Retailer 11
-
£2,379 GBP
View
Retailer 12
-
£2,379 GBP
View
Price last confirmed 8 days ago
B+
Retailer 13
-
£2,406 GBP
View
B+
Retailer 14
-
£2,446 GBP
View
B+
Retailer 15
-
£2,471 GBP
View
B+
Retailer 16
-
£2,486 GBP
View
B+
Retailer 17
-
£2,493 GBP
View
Retailer 18
-
£2,551 GBP
View
Price last confirmed 33 days ago
B+
Retailer 19
-
£2,745 GBP
View
B+
Retailer 20
-
£2,767 GBP
View
B+
Retailer 21
-
£2,903 GBP
View
Retailer 22
-
£3,961 GBP
View
Price last confirmed 9 days ago
B
Retailer 23
-
£3,978 GBP
View
Most Expensive
B
NZ Jewellers
825c2c48-2507-4220-9faf-f08f54ee642f · Nov 5
£4,144 GBP
$5,547 USD
View
23 more retailers have this diamond
Prices start from £1,798 GBPSave up to £2,347 GBP

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

A
1.00ct Round
£1,798 GBP